package org.hihn.ampd.server.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.resource.PathResourceResolver;

import java.io.IOException;

@Configuration
public class CorsConfig implements WebMvcConfigurer {

	@Override
	public void addCorsMappings(CorsRegistry registry) {
		registry.addMapping("/**").allowedMethods("GET", "POST", "HEAD", "DELETE", "PATCH", "OPTIONS");
	}

	@Override
	public void addResourceHandlers(ResourceHandlerRegistry registry) {
		registry.addResourceHandler("/**")
			.addResourceLocations("classpath:/static/")
			.resourceChain(true)
			.addResolver(new PathResourceResolver() {
				@Override
				protected Resource getResource(String resourcePath, Resource location) throws IOException {
					Resource requestedResource = location.createRelative(resourcePath);
					return requestedResource.exists() && requestedResource.isReadable() ? requestedResource
							: new ClassPathResource("/static/index.html");
				}
			});
	}

}
